import java.util.Scanner;


public class Lab8_2
{
   public static void main(String[] args)
   {
      Scanner keyboard = new Scanner(System.in);
      long population = -1;
      while(population<=0)
      {
         System.out.println("Enter the population of the city: ");
         population = keyboard.nextLong();
      }
      System.out.println("Population is "+ population);
   }
}
